12222113921 has 2 divisors, whose sum is σ = 12222113922. Its totient is φ = 12222113920.

The previous prime is 12222113867. The next prime is 12222113927. The reversal of 12222113921 is 12931122221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11780063296 + 442050625 = 108536^2 + 21025^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222113921 - 2¹⁰ = 12222112897 is a prime.

It is not a weakly prime, because it can be changed into another prime (12222113927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111056960 + 6111056961.

It is an arithmetic number, because the mean of its divisors is an integer number (6111056961).

Almost surely, 2^12222113921 is an apocalyptic number.

It is an amenable number.

12222113921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222113921 is an equidigital number, since it uses as much as digits as its factorization.

12222113921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The spelling of 12222113921 in words is "twelve billion, two hundred twenty-two million, one hundred thirteen thousand, nine hundred twenty-one".